AirHint found the following cheapest return flights from Newark (EWR) to Seoul (ICN) in October 2025 (see full year).

Return flights

22 Oct - 03 Nov	Alaska Airlines
24 Oct - 03 Nov	Alaska Airlines
22 Oct - 12 Nov	Alaska Airlines
01 Oct - 31 Oct	Alaska Airlines
16 Oct - 23 Oct	Air Canada
02 Oct - 17 Oct	Air Canada
02 Oct - 12 Oct	Air Canada
01 Oct - 11 Oct	Air Canada
02 Oct - 12 Oct	Air Premia	direct
18 Oct - 28 Oct	Air Canada
29 Oct - 08 Nov	Alaska Airlines
26 Oct - 05 Nov	Alaska Airlines
15 Oct - 22 Oct	Spirit Airlines
03 Oct - 14 Oct	Spirit Airlines
01 Oct - 28 Oct	Spirit Airlines
21 Oct - 06 Nov	Ethiopian Airlines
20 Oct - 08 Nov	Air Canada
28 Oct - 18 Nov	Air Premia	direct
28 Oct - 04 Nov	Air Premia	direct
22 Oct - 12 Nov	Air Premia	direct

Also check the deals for one-way flights from Newark to Seoul in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Newark to Seoul in October from $920

Return flights